Quartz
Silicon Dioxide (SiO2)
Category
Browse organic mineraloid and mineral specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartz (Raw / Unpolished)
Silicon Dioxide (SiO2)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Amethyst Geode
Quartz (Silicon Dioxide, SiO2) with iron impurities
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
Fossilized Shell Fragment / Mother of Pearl
Calcium Carbonate (CaCO3) - Aragonite/Calcite biomineral
Green Moss Agate
Agate (Silicon Dioxide, SiO2) with inclusions
Fossil Shark Tooth
Lamniformes (order) - likely Cretalamna or Carcharias species
Petrified Wood
Silicified Wood (Permineralized wood)
Banded Chert / Chalcedony
Silicon Dioxide (SiO2)
Sandstone
Arenite
Limestone Concretion (Botryoidal/Calcareous Nodules)
Calcium Carbonate Concretion (CaCO3)
Amber
Succinates (Fossilized Tree Resin)
Fossil Shark Tooth
Chondrichthyes (class)
Quartz (Jasper / Chert)
Silicon Dioxide (SiO2)
Libyan Desert Glass
Tektite (high-silica impact glass), SiO2 + tracing minerals
Jasper
Jasper (Silicon Dioxide, SiO2)
Mammoth Molar Fossil
Mammuthus primigenius (Tooth fragment)
Petrified Wood
Silicified wood (SiO2)
Moss Agate
Chalcedony (SiO2) with inclusions of hornblende or chlorite
Moss Agate / Chalcedony
Silicon Dioxide (SiO2)
Moss Agate
Silicon Dioxide (SiO2) with mineral inclusions
Moss Agate
Chalcedony (Silicon Dioxide) with inclusions - SiO2
Amber
Succinite (fossilized resin)
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxide
Dendritic Agate
Chalcedony (SiO2) with manganese/iron oxide inclusions
Amber
Succinite (Formula: C10H16O)
Amber
Fossilized Tree Resin (Succinate)
Bivalve Seashell Fossil
Class Bivalvia
Graphite
Carbon (C)
Graphite
Graphite (Carbon, C)
Graphite
Graphite (Carbon, C)
Polished bloodstone (heliotrope)
Chalcedony (microcrystalline quartz, SiO₂) with red iron-oxide inclusions
Orange Calcite
Calcium Carbonate (CaCO3)
Amber
Succinite (C10H16O)
Honey Calcite
Calcium Carbonate (CaCO3)
Black Freshwater Pearls
Biogenic Calcium Carbonate (Aragonite/Calcite), CaCO3
Tree Agate
Silicon Dioxide (SiO2) with Dendritic Inclusions